Swivel-hook.



W. R. GLARKSON.

SWIVEL HOOK.

APPLICATION FILED NOV'.27, 1908.

Patented Aug. 17, 1909.

UNITED STATES PATENT OFFICE.

WILLIAM R. OLARKSON, OF TENINO, WASHINGTON.

SWIVE L-HOOK.

Application filed November 27, 1908. Serial No. 464,600.

To all whom it may concern:

Be it known that 1, WILLIAM R. CLARK- SON, a citizen of the UnitedStates, residing at Tenino, in the countyv of Thurston and State of lVashington, have invented a new and useful Swivel-Hook, of which thefollowing is a specification.

It is the primary object of the present invention to provide an improvedstructure of swiveled hook, such as used for suspending the block andtackle of hoisting apparatus and the like.

One of the novel features of the invention resides in so constructingthe hook and its head that the device may be so adjusted as to permitturning of the hook with respect to the head, or to prevent suchturning, and hold the hook rigid with respect to the head.

Other novel features of the invention will be apparent from the specificdescription which is to follow, and from the drawings, in which Figure 1is a View, partly in elevation and partly in section, of a hookembodying the invention. Fig. 2 is a similar View, showing a slightmodification of the invention. Fig. 3 is a detail plan view of theadjusting collar.

In the drawings the device is illustrated as comprised of a head memberand a hook member, which, as heretofore stated, are so connected as topermit of adjustment to allow for turning of the hook member withrespect to the head member, or to hold the said hook member against suchturning movement.

The head member is preferably in the form of a substantially cylindricalbody 5, formed with a ring or other suitable element for the attachmentof a cable or the engagement of a hook or the like, indicated by thenumeral 6, and the said body 5 is formed with a cylindrical recess 7,the cylindrical wall of which is threaded, from the open end of therecess to a point near the bottom of the same, as indicated by thenumeral 8, the remainder of the said wall being plain, as indicated bythe numeral 9. The fiat or bottom wall of the recess is indicated by thenumeral 10, and affords a bearing surface for the head of the hookmember, as will be presently explained.

The hook member comprises a short shank 11, and a bill 12, and the shankis formed, at its upper end, with a fiat circular head 13, which is ofsuch size as to fit rotatably Specification of Letters Patent.

Patented Aug. 17', 1909.

within the bottom of the recess 7, the upper flat face of the head 13hearing more or less firmly against the bottom wall 10 of the recess.

Threaded into the recess '7 is a collar 14:, which snugly fits about theshank 11 of the hook member, but in such manner as to permit of freeturning of the said hook member with respect to the collar, or, in otherwords, to permit of rotation of the shank 11 of the said hook member inthe collar.

As will be understood, from an inspection of the drawings, this collar 11 serves the function of confining the head 13 of the hook member withinthe recess 7, and the said col lar 14: is formed in its upper flat facewith a ball race 15, which registers with a corresponding race 16,formed in the under face of the head 13 of the hook member of thedevice, there being received in these races anti-friction ball bearings17, which permit of free rotation of the hook member with respect to thehead member 5 when it is desired that a swivel connection be had betweenthe two members.

As shown in the drawings, the collar 14 is formed in its under face witha plurality of sockets 18, in which may be engaged the lugs of a spannerwrench, which is to be manipulated to screw the collar into the recessor unscrew the same to the proper degree; and it will be furtherunderstood that when it is not desired to have the hook member turn withrespect to the head member in the manner of a swivel connection, it isonly necessary that the collar 14 be tightly screwed into the recess soas to cause the head 13 of the hook member to bear firmly with its upperface against the fiat or bottom wall 10 of the said recess, thefrictional engagement of-the head with the said bearing surface or faceof the head member serving to prevent turning of the hook member withrespect to the head member.

In the form of the invention shown in Fi 2 of the drawings, the ballbearings 17 and the ball races 15 and 16 are eliminated from the device,and the upper face of the collar 14% forms a bearing surface for theunder face of the head 13, as does the bottom wall 10 for the upper faceof the said head 13.

The fact will be appreciated that there are numerous advantages accruingfrom the construction above described, and that the device is adaptablefor use where either a swiveled or fixed hook is to be employed.

Furthermore, it will be understood that, instead of a hook member 11, amember carrying a ring or other suitable attaching element, may beemployed in connection with the head member 5.

What is claimed is 1. In a device of the class described, a head memberformed with a recess, a hook member having a head, and a member withinsaid recess confining the head of the hook member between it and onewall of the recess.

2. In a device of the class described, a head member formed with arecess,-a hook member having a head, and a member adjustably receivedwithin the said recess confining the head of the hook member between itand one wall of the recess.

3. In a device of the 'class described, a head member formed with arecess, a hook member having a head, and a member removably receivedwithin said recess and confining'the head of the hook member between itand one wall of the recess.

at. In a device of the class described, a head member formed with arecess, a hook member having a head, and a member'threaded into saidrecess and confining the head of the hook member more or less firmlybetween it and one-wall of the recess.

5. In a device of the class described, a head member having a recess,one wall of which constitutes a bearing surface, a hook member having ahead received in said recess, and means within the recess for afi ordinga swivel bearing for said head, and for adjusting the head with respectto the bearing surface of the head member.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

VILLIAM R. OLARKSON. lVitnesses JAs. M. WALKER, J. Ross CoLHoUN.

